William Devane

as President John F. Kennedy

Ralph Bellamy

as U.N. Ambassador Adlai Stevenson

Howard Da Silva

as Soviet Premier Nikita Khrushchev

James Hong

as U.N. Secretary-General U Thant

Martin Sheen

as Attorney General Robert F. Kennedy

James T. Callahan

as David Powers, Special Assistant to the President

Peter Canon

as Admiral's Aide

Keene Curtis

as John McCone, Director CIA

Charles Cyphers

as Press Photographer

Clifford David

as Theodore Sorensen, Special Counsel

Francis De Sales

as Senator

John Dehner

as Former Secretary of State Dean Acheson

Peter Donat

as David Ormsby-Gore, British Ambassador to U.S.

Andrew Duggan

as Gen. Maxwell Taylor, Army Chief of Staff

Richard Eastham

as Gen. David M. Shoup, USMC Commandant

Robert P. Lieb

as Gen. Curtis LeMay - Air Force Chief of Staff